OTA = over-the-air , Delivery of software from the manufacturer or developer to update or resolve problems from the previous firmware, can be flashed on Fota updater app or custom recovery like CWM, TWRP or Carliv

Full OTA = OTA binary image files that allow you to manually update your device. This has the same effect of flashing the corresponding factory images, but without the need of wiping the device. Usually this firmware is used for unbricking or repair firmware by some users.